chromatic vs ruby

chromatic is not a noun while ruby is a noun.

Word	Noun	Adjective	Verb	Adverb
chromatic	No	Yes	No	No
ruby	Yes	Yes	No	No

chromatic (noun)	ruby (noun)
	a deep and vivid red color
	a transparent piece of ruby that has been cut and polished and is valued as a precious gem
	a transparent deep red variety of corundum; used as a gemstone and in lasers

chromatic (adjective)	ruby (adjective)
being or having or characterized by hue	of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies
based on a scale consisting of 12 semitones
able to refract light without spectral color separation